XERA-AM
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| Broadcast area | San Cristóbal de las Casas, Chiapas |
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| Branding | Radio Uno |
| Frequency | 760 kHz |
| First air date | November 3, 1973 |
| Format | Public radio |
| Power | 5,000 watts (day) 500 watts (night) |
| Class | B |
| Transmitter coordinates | 19°23′49″N 99°6′6″W / 19.39694°N 99.10167°W |
| Owner | Gobierno del Estado de Chiapas |
| Website | XERA-AM |
XERA is a radio station in Mexico, broadcasting on 760 AM in San Cristóbal de las Casas, Chiapas. The callsign was most famous for its use on a border blaster at Villa Acuña, Coahuila.
XERA also broadcasts on FM at 101.5 MHz. It is not licensed for this frequency; the only FM station on the frequency in Chiapas is XHDB-FM in Tonalá.
From 1935 to 1939, XERA was the call sign of a border blaster licensed to Ramón D. Bósquez Vitela in September 1935 to Compañía Mexicana Radiodifusora Fronteriza in Villa Acuña, Coahuila. This station was the successor to XER which had been situated at the same location but whose transmitter had been dismantled after the station ceased broadcasting in February 1933. Like XER, it was under the control of Dr. John R. Brinkley of the U.S. state of Kansas. XERA ceased transmissions in 1939. After losing control of XER when it was shut down by the Mexican government in 1933, Brinkley dismantled the original XER transmitter but attempted to get a new concession for Villa Acuña. Months later in September 1935 he was granted a new concession via his partnership of Cía Mexicana Radiodifusora Fronteriza, a company which was represented by Bósquez as the owner; this was officially awarded on November 18 of that year. The original station broadcast on 960 kHz.
Brinkley used the old buildings of XER but installed a new 500 kilowatt transmitter with help from two Texas radio engineers. The antenna for XER had been omnidirectional, but the new directional antenna of XERA allowed Brinkley to claim that his station had an effective radiated power of one megawatt. One of his Texas engineers called XERA "the world's most powerful broadcasting station," which was a slogan that he would use again in the 1960s for two more of his engineering endeavors: the United States military transmitters which communicated with the U.S. submarine fleet, and again for the offshore pirate station Swinging Radio England.
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